How can I cut a video accurately from a frame to antoher frame

[wthreex]

I use Avidemux to cut video stuff, but I have recently realized that it doesn 't work properly, because it doesn't cut closely from the frame to frame that I choose, and most of the time it gives me 1-2 seconds behind what I wanted (it depends of picture type? B Frame or P Frame?)

So, What would you recommend for this stuff? Avisynth can handle it ? remember i want something that cut frames exaclty what i want

thanks.